摘要
根据CT扫描数据,运用Mimics软件建立肩胛骨和锁骨三维模型,导入Ansys软件并添加CT扫描数据无法识别的韧带,最后建立完整的肩锁关节三维有限元模型。根据肩部关节的协调运动确定边界条件,并施加载荷,计算得出盂肱关节外展30°、60°、90°及120°工况下肩锁关节应力分布。结合脆性材料破坏形式与应力状态的关系,可以判别锁骨骨折及骨裂的易发部位。结果表明:锁骨上表面中1/3靠近远端处Mises等效应力及最大主应力均较大,此处最大主应力为拉应力,易出现骨断裂即骨折;锁骨下表面中1/3靠近近端处Mises等效应力较大,此处最大主应力为压应力,易出现骨碎裂即骨裂。
A 3-D model of scapula and clavicle was built up using Mimics based on CT scan data, then the model and simulated ligaments were imported in Ansys that CT scan data can＇t show, finally the whole FE model of the acromioclavicular joint was established. The border conditions were determined, the loads ac-cording with shoulder joints＇ coordinated movement were added, then the stress distribution was conclu-ded during humeral glenoid fossa external rotation of 30° ,60°,90° and 120°. And combination of the rela-tionship between failure modes and stress state of the brittle materials the prone to displaced fractures and undisplaced fracture positions in clavicle can be determined. As a result,the stress is larger in the middle 1/3 near medial-end of superior clavicle ,and the maximum principal stress here is tensile stress, tends to displaced fractures; the stress is larger in the middle 1/3 near the lateral end of inferior clavicle,and the maximum principal stress here is compressive stress, tends to undisplaced fracture.
出处
《力学季刊》
CSCD
北大核心
2012年第4期584-589,共6页
Chinese Quarterly of Mechanics
关键词
肩锁关节
锁骨
三维模型
有限元分析
acromioclavicular joint
clavicle
3-D model
finite element analysis
